Deep-well propeller-screw pump



DEEP WELL PROPELLEB SCREW PUNLP-x APPLICATION FILED OCT. 18. 1916.

Patented June 8, 1920.

2 SHEETS-SHEET l.

INVENTOR PER -ATTORNEY F W. KROGH. DEEP WELL PROPELLER SCREW PUMP.APPLICATION FILED OCT. 18, 1916.

1,342,555 1 Patented June 8, 1920. l 2 SBEET$SHEET 2- lNVENT OR rmw 41 2ATTORNEY.

FERDINAND w. KRoe or SAN FRANCISCO, POULSEN ADMINISTRATORS or SAIDCALIFORNIA; CARL A. KROGI-I AND OSCAR FERDINAND W. .KROGH, DECEASED.

, DEEP-WELL PROPELLER-SCREW PUMP.

Specification of Letters Patent.

PatentedJune s, 1920.

Application filed October 18, 1916. Serial No. 126,409.

' proved series of suitably proportioned and curved blades for impellingthe water and of intervening sections formed into diverting channels fordirecting the flow of the water.

The objects of my invention are to pro.- vide a simple, practical andoperative pump that will efficiently and constantly discharge anunvariable stream by means of a pair of suitably arranged propellingblades, having diverting waterways interposed therebetween; also toprovide in combination therewith an automatic compensating device in ythe form of an adjustable valve pivoted to the main shaft that willregulate and control the water pressure and thereby balance the pumpshaft.

Other objects of my invention will become apparent as the descriptionprogresses. In the two sheets of drawings here annexed forming a partofthisapplication in which: I

I Figure 1 represents a vertical section taken through a verticalpropeller 'screw pump constructed in accordance with this invention.

Fig. 2 is a cross section taken on line aa of Fig. 1. V V V Fig. 3 is across section taken on line Z) b of Fig.1.

Fig. 4 is a modification and elaboration of Fig. 1 showing the means oflubrication and the compensating device for automatically balancing theopposed cooperating series of propeller blades, and. the shaft.

Fig. 5 is a cross section taken on the line c-cof Fig. 4. o 4

Fig. Geis a cross section taken on the line cl-d of, ig. 4 and Fig. 7 isa vertical section of a thrust bearing for supporting the'weight of theshaft.

In detail the constructionillustrated in the drawing, Fig. 1 shows theouter casing of a pump designated by the numeral l havei ing the inner,tubular shaped casing-'2, spaced from the outer casi'n'gl and held inposition by the coredinlet openings 3. The outer casing 1 is flanged atits topmost end as at '4 to provide a means for connecting the, pipe.

The bottom 5 isrounded at 6 tOfCllIl'llIllSll the frictional tendenciesand has the bearing j 7 formed therein for the shaft 8, and to re-'ceive any end thrust which the said shaft might have.

Securely fastened to the shaft 81are the l hubs 9 provided with aplurality of suitably shaped spiral blades '10. The Hat semi-ellipticbraces 11 securely fastened in a slanted position within the collar 12,which is rigidly secured to the inner casing 2, are interposed betweeneach [set of spiral blades 10 and prevent any water that is being pumpedfrom swirling. As can be easily perceived in the drawing (Fig. 1)theshaft 8 has two series of spiral blades 13 and 14, correctly spacedwith reference to the inlets 3, the pressure faces of the oppositeseries of blades are directly-opposed. The blades 10 on the lower series13 are so formed that when revolved, the liquid contained in the innercasing will be forced downward, whereas the series 14, when revolved inthe same direction, as the lower series, will force the liquid upward.This is dueto the fact thatthe blades are spirally opposite directions.

The action of the described pump is somewhat similar to the doubleacting pump now in common use in that, a double pumpshaped, and pitchedin ing action results, but pulsation is absent,

the latter 1 being a continuous flow, which the. alternating acadownward thrust at 13 and an upward thrust at 15., The liquid ineach-case is forced away from the inlets 3. As the liquid is beingpushed downward by the propeller seriesv 13, it encounters the concavesurface .6 of

. 14 and force the liquid through the outlet 7 blades 10 an aetionisimparted to it action is broken by the interposed braces the liquid.

bottom 5, and not being able to go back through the tubularccasing 2, isdeflected upward in the channel16 formed by the casing 2,,spacedfromithe outercasing 1. The liquid from the propeller series 14 hasbeenforced upward synchronously with the water from series 13 that has beenforced downward so that the two liquids meet at through the theoutlet15, and continue on connect ng plpe (here not shown). Asthe water1s pressed forward by the revolving 11; The braces ll are a valuableasset in that they destroy any whirling motion oi urality of spiralblades contained The p in each of the series '13 and 14 are so fas tenedon the shaft '8 that they are balanced perfectly. Were: the seriesblades 10 not affixed in a-balanced manner, an undue strain would beimposed onone or the other propellers and would deter its mechanicalabilities. V i

A modification is shown in Fig; 4 in which 17' denotesthe main pumpcasing im closed atoits lower end by the enlarged 63$: ing 18, which maybe connected toa suction pipe. Thetubu-lar casing 17 is turned at 19 soparallel with the main pump casing. The

a ends of the casing 17' and 20 terminate in-the upon which series 24and 25 attached thereon with 7 propellersof series 24 or 25 and itsmove- 1 ments, operate the compensating device consisting of arm. 30pivoted to the extended portion 31 above the chambers 21 and pivotallyvided with connecting rod 83 having the diminish or increase cone shapedgate 34' secured thereonito the pressure of liquid passing through theport 35; i

The operation of the compensating device is asfollows, The port 85 beingclosed 5 a as shown in Fig. 4 by the downward move- 'ment of. the shaftthenthe downward pressure of water from thepropeller series 24againstthe gate 34 will become greater than the upward pressure. ofwater from the propeller series 25 that will cause the shaft 23 to moveupward and through the arm 30 and rod 3.3,; the gate 34will'move upwardwhich V propellers. and the upper that the continued section 20-isto theVariations in the 131 68% 7 sure of he incoming liquid exerted on theconnected to shaft 23 at 32, and pro- 7 and consequently open theport 35thus releasing the water pressure and thereby causing the'upward watervpressure from the propellers series '25 together .with the weight of theshaft, etc., to'move,the latteridownwardly and vice versa until theshaft 23 finds its "equilibrium, thus balancing the shaft. f

' Rotation is imparted to the shaft 28? by a belt running on, the pulley36, or motor connected to the shaft if desired.

The maner of lubricating deep well shafts has heretofore: been, ajsource,- of' endless trouble, but-it'is: wel'ltaken. care, of in thiscase by the positive force pump 87; havautomatically ing the pipe 38"with its tributariesB-Q run- 7 ning to allthebeari ngs v a Around theprope1l'ers shaft; as shown in Figs. 1 and 4,,is a pipe easing40,,whi'ch is located between the upper series 25 of'the shaft andcarries, the ,waste oil leaking out from the hearings to; the dischargepipe, 41.,

As shown in Fig1thepipe casing 40is provided above the collar 12 withpacking bearing 29' of the c 42 forced down by a weight '43,,to' preventi il at that point from leaking out into the outer casing-p V It will benoticedin Fig; 1 that the, number of propellers at the top of casing 215 less than at the bottom, because in addition j p to the balance of.the water on the upper propeller, it, also has to carry all itscouplings and connections. This can-- not be accurately done. It will,therefore,

require an adjustable mechanical thrust bearing,\to.take theunbalancedweight of same and'keep it, in its proper place so that v thepropeller hubs will .haverno rubbing surfa e thrust bearing consistingoftwo frames 44, and 45 forming a part of the main casing of the pump andprojecting therefrom around the rotating shaft 8 thereof.

Upon the shaft, 8 is a. collar secured thereon between: the frames44and45 byrneans of. a set. screw 4 or otherwise, and on each side ofthe collar 46 are two. loose rings. 48provided therebetween with ballbearings 49 to form antifrictional means. against one,v of theprojecting frames 44 and 45 to which theshaft may move. 1 v pHavingftlrus described; my invention, and anembodimcnt of it, in thefull,'clear and exact terms-required by law, and knowing that itcomprises novel, useful and valuable improazements in the, art to. whichit pertains, I here state that I do not wish to be limited to. the:precise COIlStIllClllOIliLllfil arrangement of the several parts, as,herein set forth, asthe samemay b evariously modified by a skilledmechanic without departing from thespirit' of the invention.

In 7 I have shown an example of such 46 aa nsauy j prej ectine" V theshaft with V What I claim and desire to secure by Letters Patent of theUnited States, is the fol- 7 mg having an intake port; a shaft mountedin said inner casing having securely fastened thereon a set of propellerscrews of which one set of pressure faces is mounted on the reverse ofthe other in an inclined position; a continuation of said inner casingon the outside running parallel to said inner casing; a chamber coveringthe ends of said casing; and a valve covering the ends of said parallelpipe controlled by a lever arm attached to the main shaft.

2. In combination with a screw pump; a casing having an outlet port; aninner casing with inlets therein, having a lower extended portion bentand made parallel with the said inner casing so that the ends lie in thesame plane; a chamber covering said open pipe ends; a shaft with twosets of pro peller screws securely mounted thereon having the blades ofone set attached the reverse of the other, revolubly running in saidinner casing; between said blades; and a valve covering the end of saidbent parallel casing, having an arm attached thereto that is pivotallymounted on the shaft, and pivotally secured to the casing of saidchamber. V

3. In combination with a screw pump; a casing having an outlet port; aninner cas a deflecting means interposed having a lower-enmade parallelwith that the ends lie in ing with inlets therein, tended portion bentand the said inner casing so the same plane; open pipe ends; a shaftwith two sets of propeller screws securely mounted thereon having theblades of one set attached the reverse of the other, revolubly runningin said inner casing; a deflection means interposed between said blades;a valve covering the end of said bent parallel casing, having an armattached thereto that mounted on the shaft and pivotally secured to thecasing of said chamber, and a means for lubricating the bearings of saidshaft.

4. In combination with a casing having an outlet port; an inner casingwith inlets therein, having a lower eX-' tended portion bent and madeparallel with the said inner casing; a shaft with two sets of propellerscrews securely mounted thereon having the blades of one set secured thereverse of the other, revolubly running in said inner casing; adeflection means interposed between said blades; a valve for said bentparallel casing, andmeans on said shaft to control said valve.

In testimony that I claim the foregoing, I have hereto set my hand this13 day of Oct., 1916, in the presence of two witnesses.

FERDINAND W. KROGH. Witnesses: Y

LOUISE BEARDIN, FLORENCE L. WOLFE.

screw pump; a

a chamber covering said is pivotally v

